Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 4tr9_E.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 3.A OG GLU 6.A OE2 no hydrogen 3.225 N/A LYS 7.A N SER 3.A O no hydrogen 3.310 N/A LYS 8.A N LEU 4.A O no hydrogen 3.022 N/A